<template>
  <div>
      <!-- 面包屑导航区域 -->
       <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 提示区域 -->
            <el-alert
                title="添加商品信息"
                type="info"
                center
                show-icon :closable="false">
            </el-alert>
            <!-- 步骤条区域 -->
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px"
             label-position="top">
                <el-tabs tab-position="left" v-model="activeIndex" :before-leave='beforeLeave'
                @tab-click ='tabClicked'>
                    <el-tab-pane label="基本信息" name='0'>
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight" >
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop='goods_cat'>
                            <el-cascader
                                v-model="addForm.goods_cat"
                                :options="cateList"
                                :props="cateProps"
                            @change="handleChange">
                            </el-cascader>
                        </el-form-item>

                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name='1'>
                        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key='item.attr_id'>
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cItem" v-for="(cItem,i) in
                                item.attr_vals" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name='2'>
                        <el-form-item :label='item.attr_name' v-for='item in onlyTableData' :key='item.attr_id'>
                            <el-input v-model='item.attr_vals'></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name='3'>
                           <!-- action 图片上传的后台地址 -->
                        <el-upload
                            :action="uploadUrl"
                            :headers='headerObj'
                            :on-preview="handlePreview"
                            :on-remove="handleRemove"
                            list-type="picture"
                            :on-success='handleSuccess'
                            >
                            <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name='4'>
                        <quill-editor v-model='addForm.goods_introduce'></quill-editor>
                        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
            <!-- 图片预览对话框 -->
            <el-dialog
                title="图片预览"
                :visible.sync="previewVisible"
                width="50%"
                >
                <img :src="previewPath" alt="" class="previewImg">
            </el-dialog>
        </el-card>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '0', // 进度条默认激活
      addForm: {
        goods_name: '', // 商品名称
        goods_price: 0, // 商品价格
        goods_weight: 0, // 商品重量
        goods_number: 0, // 商品数量
        goods_cat: [], // 商品所属的分类数组
        pics: [], // 图片的数组
        goods_introduce: '', // 商品详情
        attrs: []
      }, // 表单的验证对象
      addFormRules: {
        goods_name: [
          { required: 'true', message: '请输入商品名称', trigger: 'blur' }
        ], // 商品名称
        goods_price: [
          { required: 'true', message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: 'true', message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: 'true', message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: 'true', message: '请选择商品的分类', trigger: 'blur' }
        ]

      },
      cateList: [], // 商品分类数组
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      manyTableData: [], // 动态参数列表数据
      onlyTableData: [], // 静态属性列表
      uploadUrl: 'https://www.liulongbin.top:8888/api/private/v1/upload', // 上传图片的地址
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      }, // 这是图片上传组件的headers请求头对象
      previewPath: '', // 图片地址
      previewVisible: false

    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('/categories')
      if (res.meta.status !== 200) {
        return this.$http.error('获取商品分类数据失败!')
      }
      this.cateList = res.data
    },
    // 监听级联选择器变化触发
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // 监听tabs切换
    beforeLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类!')
        return false
      }
    },
    //
    async tabClicked () {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`/categories/${this.cateId}/attributes`, {
          params: {
            sel: 'many'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        res.data.map(item => {
          if (item.attr_vals.length !== 0) {
            item.attr_vals = item.attr_vals.split(' ')
          } else {
            item.attr_vals = []
          }
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`/categories/${this.cateId}/attributes`, {
          params: {
            sel: 'only'
          }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败')
        }
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove (file) {
      // 获取图片临时路径
      const tmPath = file.response.data.tmp_path
      const index = this.addForm.pics.findIndex(item => item.pic === tmPath)
      this.addForm.pics.split(index, 1)
    },
    // 监听图片上传成功事件
    handleSuccess (response) {
      console.log(response)
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
    },
    add () {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return this > $message.error('请填写必要的业务逻辑!')
        // 处理动态参数和静态属性
        this.manyTableData.map(item => {
          const newInfo = {}
          newInfo.attr_id = item.attr_id
          newInfo.attr_value = item.attr_vals.join(' ')
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.map(item => {
          const newInfo = {}
          newInfo.attr_id = item.attr_id
          newInfo.attr_value = item.attr_vals
          this.addForm.attrs.push(newInfo)
        })
        // 深拷贝form
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        const { data: res } = await this.$http.post('/goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败!')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }

  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
    .el-steps{
        margin: 15px 0;
    }
    .el-checkbox{
        margin: 0 10px 0 0 !important;
    }
    .previewImg{
        width: 100%;
    }
    .btnAdd{
        margin-top: 15px;
    }
</style>
